Mitering machine



May 5, 1942. w. J. KNOLL 2,282,436!

MITERING MACHINE Filed Dec. 22, 1939 Patented May 5, 1942 MITERING MACHINE William Jacob Knoll, Chicago, 111. assignmto H. B. Rouse & Company, Chicago, 111., a corporation of Illinois Application December 22, 1939, Serial No. 310,583

Claims.

The invention relatesgenerally to device for mitering printers rules and more particularly to an improved carriage for holding the rule while being mitered. I

The invention has among its objects the production of such a device which is constructed of relatively few parts, very durable and very efficient for the purpose intended.

Another object of the invention is the production of rule holding means which may be operated in a minimum amount of time and in which adjustments for various sized rules are unnecessary.

A further object of the invention is the construction of such a holder in which the clamping pressure is increased for rules of greater thickness and diminished for very thin rules.

Many other objects and advantages of the construction herein shown and described will be obvious to those skilled in the art from the disclosure herein given.

To this end my invention consists in the novel construction, arrangement, and combination of parts herein shown and described and more particularly pointed out in the claims.

In the drawing wherein like reference characters indicate like or corresponding parts:

Fig. 1 is a side elevational view of a mitering machine embodying the present invention with portions thereof broken away;

Fig. 2 is a plan sectional view through the clamping or holding mechanism; and

Fig. 3 is an elevational view in section of the clamping mechanism.

It has been customary in machines for mitering printers rules to employ a carriage or holder for holding the rule while it is being mitered. These holders have, in the past, utilized an ordinary screw type clamp or the like to carry the rule. By rotating a knob in one direction, the clamping means was opened to receive the rule, and by rotating the knob in the opposite direction, the clamp was screwed down to grip the rule.

With the present invention, the clamp is spring operated, the operating handle or knob merely being moved inwardly to allow the clamping portion to receive or release the rule. When the knob is returned to its original position, the rule will be securely held in place. Obviously, such a holder may be operated more quickly than one requiring the turning or unscrewing of a knob to operate the clamping means.

Illustrated is a mitering machine of more or less general style comprising a base upon which is carried stationary uprights 2.

uprights is a bearing block} having. a cutter 4 lournaled therein, the latter driven by means of a pulley and belt 6 from a suitable power source. The bearing block 3 is moved into and out of cut-- ting position by means of a handle 1 pivotally connected at 8 tothe upright 2 and to the bearing block by means of a link 9. A tension spring l0 secured at one end to the base and at the opposite. end to the handle returns and maintains the cutter in non-cutting position. Secured to the base I is a cross head I The latter is provided with a channel or groove |2in the upper end thereof of asize to receive a block I3, said block being slidable therein. Extending from one end of the block on opposite sides thereof are a pair of clamping jaws H, the latter being generally L- shaped and engageable with the platen bar l5 which is secured to and carried by the cross head. A plate I6 extends laterally from the cross head adjacent the bottom of the platen bar 5 forming supporting means for the rule I! while the cutter 4 moves downwardly to miter the same, the cutter passing intermediate the two jaws I4. Thus, the rule is securely held in place on opposite sides of the cutter. Extending from the end of the block l3 opposite the jaws l4, and secured thereto by a pin |8 is a stem IS, the latter passing through a collar 2| attached to the cross head H by screws 22. A knob 23 is secured to the end of the stem I9 by a screw 24. The collar 2| is provided with a bore 25 of a size to receive a compression spring 26, the latter seating at one end against the knob 23 and at the other end against the inwardly extending flange 2'! of the collar. Thus, it will be seen that the spring 26 urges the stem I9 and block I3 to force the jaws [4 into engagement with the platen bar IS. A cap plate 28 is secured to the cross head II by any suitable means such as screws 29 and covers the channel |2.

In use, the knob 23 is merely pushed inwardly towards the cross head compressing the spring 26 and moving the jaws l4 away from the platen bar l5, thereby allowing the insertion of the rule between the same, therule resting upon the plate l6. Upon releasing the knob, the spring 26 will force the jaws l4 outwardly, clamping the rule between the jaws and the platen bar.

It will be noted that the jaws M will grip a thick rule more strongly than a thin rule due to the increase in spring compression, thereby preventing damaging of thin rules. As the only operation necessary to lock or release the rule is to position the knob 2| inwardly or release the same, operation is speeded up considerably, there being Slidable in the no knobs to tighten or unscrew. Likewise. as

there are few parts, the device is very durable, there being no parts to adjust or the like.

Having thus described my invention, it is obvious that various immaterial modifications may be made in the same without departing from the spirit or scope of my invention; hence, I do not wish to be understood as limiting myself to the exact form, construction, arrangement, and combination of parts herein shown and described or uses mentioned.

What I claim as new and desire to secure by Letters Patent is:

1. In a rule mitering machine, the combination of a cutter, a cross head operatively related thereto and having a channel therein, a jaw slidably carried in said channel, a platen bar extending transversely to said cutter in opposition to said jaw, and resilient means for urging th jaw and bar into clamping relation for clamping a rule therebetween while engaged with the cutter.

2. In a device of the kind described, the combination of a cutter, a supporting member oper-,

and extending beyond said channel, a platen bar mounted on said supporting member above the horizontal portions of said jaws in opposed rela-z tion to vertical portions of the same, a stem secured to said block, and a spring operatively related to said supporting member and stem for urging said block in a direction to draw said jaws toward said platen bar for clamping a rule therebetween.

4. In a device of the kind described, a supporting member having a channel therein, a block 'slidable in said channel, jaws carried by said block, a platen bar carried, by said member in opposed relation to said jaws, a stem extending from said block, a handle on said stem, and a spring operatively related to said stem and member for urging said jaws toward said bar for clamping a rule therebetween.

5. In a device of the kind described, a supporting member having a channel therein, a block slidable in said channel, jaws extending from one side of saidblock, a stem extending from the opposite side of said block, aplaten bar carried by said member in opposed relation to said jaws, said jaws and bar operative to clamp a rule therebetween, a collar surrounding said stem and secured to said member, said stem terminating in a knob, a compression spring encircling said stem and engageable at its ends with said collar and knob, respectively, to draw said jaws toward said platen bar.

WILLIAM JACOB KNOLL. 

